Installing ENERGY STAR qualified windows lowers energy bills and saves you money over single-pane and even new double-paned, clear-glass windows.
for a typical home, choose ENERGY STAR and save:
Estimated savings vary from region to region based on home heating and cooling costs and are generally greatest where there are hot summers, cold winters or both.
Estimated savings for a typical home from replacing single-pane with ENERGY STAR qualified windows are significant in all regions of the country, ranging from $110 to $400 a year.†

Estimated savings from choosing ENERGY STAR over double-paned, clear-glass replacement windows for a typical home range from $20 to $95 a year.††

Estimated savings from choosing ENERGY STAR over double-paned, clear-glass windows in new construction for a typical home range from $20 to $85 a year.††

Typical Home: Default home in RESFEN 3.1, or a 2,000 sq. ft., single story, detached house with 300 sq. ft. of window area, gas heat and electric air conditioning.
† ENERGY STAR vs. Single-Pane: U.S. Department of Energy. Savings estimates based on population-weighted regional average annual energy use for a 2,000 sq. ft., single story, detached house with 300 sq. ft. of window area, gas heat and electric air conditioning. Estimates use August 2005 state average utility rates. Actual savings will vary by climate region and home characteristics.
†† ENERGY STAR vs. Typical Alternative: U.S. Department of Energy. Savings estimates based on population-weighted regional average annual energy use for a 2,000 sq. ft., single story, detached house with 300 sq. ft. of window area, gas heat and electric air conditioning. Estimates use August 2005 state average utility rates. The typical alternative (double-paned, clear-glass) may not be applicable to all jurisdictions due to mandatory building codes. Actual savings will vary by climate region and home characteristics.
Savings estimates were generated using a methodology based on RESFEN 3.1 calculations performed by Lawrence Berkeley National Laboratory (LBNL)